Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

accessing uart

hi guyz...

i am using quartus-V5.0 and NIOSII IDE for my design on UP3kit...

i want to access UART and i used the function in HAL library for NIOSII IDE

altera_uart_read(alt_fd* fd, char* ptr, int len);

but what is this "alt_fd"....

i came to know that it is a file descriptor and

assigned as.................

alt_fd* fd="\dev\uart_0";

my design has a uart also which is appropriately assigned to pins on the board..

but i was not able to read data sent to the UART ....

i have sent the data thru the PC by using a c-prog which sends data to COM port continuously....

what is the problem.....

plz someone explain me.......

byeeeeeeeee

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    I can not find the function altera_uart_read on my system, but I guess it is the same as alt_avalon_uart_read.

    This function is part of the hal device driver for the uart (please correct me if I am wrong).

    To access files or character-mode devices you should use the newlib functions or the unix-style interface provided by the HAL.

    Refer to "Nios II Software Developer's Handbook" and "Altera Embedded Peripherals Handbook" for more information.

    --Wolf
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    --- Quote Start ---

    originally posted by pfab@Nov 15 2005, 06:08 AM

    i can not find the function altera_uart_read on my system, but i guess it is the same as alt_avalon_uart_read.

    this function is part of the hal device driver for the uart (please correct me if i am wrong).

    to access files or character-mode devices you should use the newlib functions or the unix-style interface provided by the hal.

    refer to "nios ii software developer's handbook" and "altera embedded peripherals handbook" for more information.

    --wolf

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=10994)

    --- quote end ---

    --- Quote End ---

    thanku Mr.Wolf ..

    yes it is alt_avalon_uart_read...i was mistaken....

    i will try as you said ....

    thanks....